I think the answer to this is not to bring back the death penalty but bring back, "life without parole."
We, as older people, should get together and tell the courts that just because we're old doesn't mean we can't kill and assault. I hear detectives on Dateline saying, "a woman couldn't do this," or "this man couldn't have done it because he's ill or walks with a cane." Well I'm, old, a woman, and walk with a cane, but I can still do whatever I want to when the desire is there.
Yesterday, I drove my dog to the vet, left my cane in the car and carried her into the office, fending off all the big dogs in the waiting room who wanted me to put her down so they could play with her. I'm sure I could put anti-freeze in my husband's Dr. Pepper, like all those other wives.